chmod /tmp/vagrant-cache on guest VM to 777 to work around some permission issues as explained on GH-74

lib/vagrant-cachier/action/install_buckets.rb

@@ -4,17 +4,24 @@ module VagrantPlugins
   module Cachier
     class Action
       class InstallBuckets
-        def initialize(app, env)
+        def initialize(app, env, opts = {})
           @app    = app
           @logger = Log4r::Logger.new("vagrant::cachier::action::clean")
+          @opts   = opts
         end
 
         def call(env)
           @app.call(env)
 
+          chmod_bucket_root(env[:machine]) if @opts[:chmod]
           configure_cache_buckets(env)
         end
 
+        def chmod_bucket_root(machine)
+          @logger.info "'chmod'ing bucket root dir to 777..."
+          machine.communicate.sudo 'chmod 777 /tmp/vagrant-cache'
+        end
+
         def configure_cache_buckets(env)
           return unless env[:machine].config.cache.enabled?
 

lib/vagrant-cachier/hooks.rb

@@ -7,7 +7,7 @@ module VagrantPlugins
 
         hook.before Vagrant::Action::Builtin::Provision, Action::ConfigureBucketRoot
         # This will do the initial buckets installation
-        hook.after Vagrant::Action::Builtin::Provision, Action::InstallBuckets
+        hook.after Vagrant::Action::Builtin::Provision, Action::InstallBuckets, chmod: true
       end
 
       # This ensure buckets are reconfigured after provisioners runs